We don't have a biography for Arnold yet. Hang in there, or go ahead and contribute one.
Appearances
Happy Days
Guest cast, played by Pat Morita
- Episode 3x03: Fearless Fonzarelli (1) (Sep 23, 1975)
- Episode 3x04: Fearless Fonzarelli (2) (Sep 30, 1975)
- Episode 3x06: Richie Fights Back (Oct 14, 1975)
- Episode 3x07: Jailhouse Rock (Oct 21, 1975)
- Episode 3x08: Howard's 45th Fiasco (Oct 28, 1975)
- Episode 3x12: Fonzie's New Friend (Nov 25, 1975)
- Episode 3x15: Dance Contest (Jan 6, 1976)
- Episode 3x16: The Happy Days 2nd Anniversary Special (Jan 12, 1976)
- Episode 3x18: Football Frolics (Jan 20, 1976)
- Episode 3x19: Fonzie the Superstar (Jan 27, 1976)
- Episode 3x20: Two Angry Men (Feb 3, 1976)
- Episode 3x21: Beauty Contest (Feb 10, 1976)
- Episode 3x22: Bringing Up Spike (Feb 17, 1976)
- Episode 3x23: A Sight for Sore Eyes (Feb 24, 1976)
- Episode 3x24: Arnold's Wedding (Mar 2, 1976)
- Episode 4x19: Graduation (2) (Feb 15, 1977)
- Episode 6x23: Fonzie's Funeral (2) (Feb 27, 1979)
- Episode 10x03: Empty Nest (Oct 19, 1982)
- Episode 10x05: Little Case of Revenge (Nov 9, 1982)
- Episode 10x06: Who Gives a Hootenanny? (Nov 16, 1982)
- Episode 10x08: Such a Nice Girl (Nov 30, 1982)
- Episode 10x09: There's No Business Like No Business (Dec 7, 1982)
- Episode 10x10: All I Want for Christmas (Dec 14, 1982)
- Episode 10x15: Life Is More Important Than Show Business (Jan 25, 1983)
- Episode 10x17: I'm Not at Liberty (Feb 8, 1983)
- Episode 11x01: Because It's There (Sep 27, 1983)